Update priority and severity for PCF project (#1207)

Co-authored-by: Mathieu Leplatre <[email protected]>

Author: davehunt

config/config.prod.yaml

@@ -364,20 +364,30 @@
         - maybe_assign_jira_user
         - maybe_update_issue_status
         - maybe_update_issue_resolution
+        - maybe_update_issue_priority
+        - maybe_update_issue_severity
         - sync_whiteboard_labels
         - sync_keywords_labels
       existing:
         - update_issue_summary
         - maybe_assign_jira_user
         - maybe_update_issue_status
         - maybe_update_issue_resolution
+        - maybe_update_issue_priority
+        - maybe_update_issue_severity
         - sync_whiteboard_labels
         - sync_keywords_labels
         - add_jira_comments_for_changes
       comment:
         - create_comment
     status_map: *basic-status-map
     resolution_map: *basic-resolution-map
+    priority_map:
+      P1: P1
+      P2: P2
+      P3: P3
+      P4: P4
+      P5: P5
 
 - whiteboard_tag: proton
   bugzilla_user_id: tbd